jquery判断RadioButtonList和RadioButton中是否有选中项示例

复制代码 代码如下:

  <pre class="html" name="code"> <%--Body 代码--%>

  <div>

  <asp:RadioButtonList ID="RadioButtonList1" runat="server">

  <asp:ListItem Value="A">a</asp:ListItem>

  <asp:ListItem Value="B">b</asp:ListItem>

  </asp:RadioButtonList>

  <asp:RadioButton ID="RadioButton1" GroupName="RBtn" Text="男" runat="server" Checked="true" />

  <asp:RadioButton ID="RadioButton2" GroupName="RBtn" Text="女" runat="server" />

  <asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="Button1_ClientClick()"></asp:Button>

  </div></pre>

  

复制代码 代码如下:

  <pre class="csharp" name="code"><%--Head 代码--%>

  <script language="javascript" type="text/javascript" src="js/jquery-1.9.1.js"></script>

  <script language="javascript" type="text/javascript">

  function Button1_ClientClick()

  {

  alert($("input[name='RadioButtonList1']:checked").val()); // 若都没有选中,则弹出“undefined”,若有选中的,则弹出对应的 Value 值

  if(document.getElementById("RadioButton1").checked==true) // 若RadioButton1被选中

  {

  alert($("#RadioButton1:checked").val()); //弹出 RadioButton1

  alert($("#RadioButton2:checked").val()); //弹出 undefined

  alert($("#RadioButton1:checked").val()=="RadioButton1"); //弹出 true

  }

  return false; //暂时不用传到后台

  }

  </script>

  </pre>